All Outputs (170)

Cell voltage versus electrode potential range in aqueous supercapacitors (2015)
Journal Article
Dai, Z., Peng, C., Chae, J. H., Ng, K. C., & Chen, G. Z. (2015). Cell voltage versus electrode potential range in aqueous supercapacitors. Scientific Reports, 5(1), Article 9854. https://doi.org/10.1038/srep09854

Supercapacitors with aqueous electrolytes and nanostructured composite electrodes are attractive because of their high charging-discharging speed, long cycle life, low environmental impact and wide commercial affordability. However, the energy capaci... Read More about Cell voltage versus electrode potential range in aqueous supercapacitors.

Supercapatteries with Hybrids of Redox Active Polymers and Nanostructured Carbons (2015)
Book Chapter
Stevenson, A. J., Gromadskyi, D. G., Hu, D., Chae, J., Guan, L., Yu, L., & Chen, G. Z. (2015). Supercapatteries with Hybrids of Redox Active Polymers and Nanostructured Carbons. In X. Feng (Ed.), Nanocarbons for Advanced Energy Storage. Volume 1 (179-210). Wiley. https://doi.org/10.1002/9783527680054.ch6

© 2015 Wiley-VCH Verlag GmbH & Co. KGaA. All rights reserved. This chapter considers the development and role of supercapatteries as practical energy storage devices for commercial development. Current battery technology can produce a high power de... Read More about Supercapatteries with Hybrids of Redox Active Polymers and Nanostructured Carbons.

Electrochemical preparation of fine powders of nickel-boron alloys in molten chlorides for magnetic hydrogenation catalysts (2015)
Journal Article
Peng, J., He, R., Tan, M., Dou, Y., Wang, Z., Chen, G. Z., & Jin, X. (2015). Electrochemical preparation of fine powders of nickel-boron alloys in molten chlorides for magnetic hydrogenation catalysts. Journal of The Electrochemical Society, 162(4), H271-H277. https://doi.org/10.1149/2.0871504jes

© The Author(s) 2015. Fine powders of magnetic nickel-boron alloys were prepared for the first time by direct electrochemical reduction of the 2Ni3(BO3)2/B2O3, Ni3(BO3)2/NiO and Ni3(BO3)2/3NiO composite precursors in molten CaCl2-NaCl at 700°C. Precu... Read More about Electrochemical preparation of fine powders of nickel-boron alloys in molten chlorides for magnetic hydrogenation catalysts.

Redox electrolytes in supercapacitors (2015)
Journal Article
Akinwolemiwa, B., Peng, C., & Chen, G. Z. (2015). Redox electrolytes in supercapacitors. Journal of The Electrochemical Society, 162(5), A5054-A5059. https://doi.org/10.1149/2.0111505jes

© The Author(s) 2015. Most methods for improving supercapacitor performance are based on developments of electrode materials to optimally exploit their storage mechanisms, namely electrical double layer capacitance and pseudocapacitance. In such case... Read More about Redox electrolytes in supercapacitors.

The FFC Cambridge process and its relevance to valorisation of ilmenite and titanium-rich slag (2014)
Journal Article
Chen, G. Z. (2015). The FFC Cambridge process and its relevance to valorisation of ilmenite and titanium-rich slag. Mineral Processing and Extractive Metallurgy, 124(2), 96-105. https://doi.org/10.1179/1743285514y.0000000073

© 2015 Institute of Materials, Minerals and Mining and The AusIMM. The Fray-Farthing-Chen (FFC) Cambridge process was patented in 1998 for low cost and clean electrochemical extraction of metals and synthesis of alloys directly from the mineral precu... Read More about The FFC Cambridge process and its relevance to valorisation of ilmenite and titanium-rich slag.

Titanium carbide nanocube core induced interfacial growth of crystalline polypyrrole/polyvinyl alcohol lamellar shell for wide-temperature range supercapacitors (2014)
Journal Article
Weng, Y., Pan, H., Wu, N., & Chen, G. Z. (2015). Titanium carbide nanocube core induced interfacial growth of crystalline polypyrrole/polyvinyl alcohol lamellar shell for wide-temperature range supercapacitors. Journal of Power Sources, 274, 1118-1125. https://doi.org/10.1016/j.jpowsour.2014.10.158

This is the first investigation on electrically conducting polymers–based supercapacitor electrodes over a wide temperature range, from −18 °C to 60 °C. A high-performance supercapacitor electrode material consisting of TiC nanocube core and conforma... Read More about Titanium carbide nanocube core induced interfacial growth of crystalline polypyrrole/polyvinyl alcohol lamellar shell for wide-temperature range supercapacitors.

Investigation of electrochemical reduction of GeO2 to Ge in molten CaCl2-NaCl (2014)
Journal Article
Rong, L., He, R., Wang, Z., Peng, J., Jin, X., & Chen, G. Z. (2014). Investigation of electrochemical reduction of GeO2 to Ge in molten CaCl2-NaCl. Electrochimica Acta, 147, 352-359. https://doi.org/10.1016/j.electacta.2014.09.107

Electrochemical reduction of solid GeO2 has been investigated in the mixed CaCl2-NaCl melt at 1023 K for developing a more efficient process for preparation of Ge. Cyclic voltammetry and potentiostatic electrolysis were applied to study the GeO2-load... Read More about Investigation of electrochemical reduction of GeO2 to Ge in molten CaCl2-NaCl.

Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling (2014)
Conference Proceeding
Kulsangcharoen, P., Klumpner, C., Rashed, M., Asher, G., Chen, G. Z., & Norman, S. A. (2014). Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling. In 2014 16th European Conference on Power Electronics and Applications. https://doi.org/10.1109/epe.2014.6911043

This paper assesses different energy loss estimation methods using the supercapacitor model parameters extracted from the electrochemical impedance spectroscopy (EIS). Two energy loss estimation methods are applied to two similar supercapacitors from... Read More about Assessing the accuracy of loss estimation methods for supercapacitor energy storage devices operating under constant power cycling.

Preparation of Mo nanopowders through electroreduction of solid MoS 2 in molten KCl–NaCl (2014)
Journal Article
Gao, H., Tan, M., Rong, L., Wang, Z., Peng, J., Jin, X., & Chen, G. Z. (2014). Preparation of Mo nanopowders through electroreduction of solid MoS 2 in molten KCl–NaCl. Physical Chemistry Chemical Physics, 16(36), 19514-19521. https://doi.org/10.1039/c4cp01864h

Electro-deposition and re-oxidation of carbon in carbonate containing molten salts (2014)
Journal Article
Ijije, H. V., Chen, G., Lawrence, R. C., Siambun, N. J., Jeong, S. M., Jewell, D. A., & Hu, D. (2014). Electro-deposition and re-oxidation of carbon in carbonate containing molten salts. Faraday Discussions of the Chemical Society, 172, 105-116. https://doi.org/10.1039/c4fd00046c

Indirect electrochemical reduction of carbon dioxide to carbon nanopowders in molten alkali carbonates: Process variables and product properties (2014)
Journal Article
Ijije, H. V., Sun, C., & Chen, G. Z. (2014). Indirect electrochemical reduction of carbon dioxide to carbon nanopowders in molten alkali carbonates: Process variables and product properties. Carbon, 73, 163-174. https://doi.org/10.1016/j.carbon.2014.02.052

Carbon was deposited on a mild steel cathode during electrolysis in the molten mixture of Li2CO3 and K2CO3 (mole ratio: 62:38) under CO2 or mixed N2 and CO2 atmospheres at 3.0–5.0 V and 540–700 °C. In a three-electrode cell, cyclic voltammetry was ap... Read More about Indirect electrochemical reduction of carbon dioxide to carbon nanopowders in molten alkali carbonates: Process variables and product properties.

A sunlight assisted dual purpose photoelectrochemical cell for low voltage removal of heavy metals and organic pollutants in wastewater (2014)
Journal Article
Chen, G. Z., Kim, G., & Igunnu, E. (2014). A sunlight assisted dual purpose photoelectrochemical cell for low voltage removal of heavy metals and organic pollutants in wastewater. Chemical Engineering Journal, 244, 411-421. https://doi.org/10.1016/j.cej.2014.01.090

Photoelectrochemical cells that consisted of a Pt (small cells) or Ti (large cells) cathode and a sunlight responsive WO3 photoanode were built for simultaneous removal of heavy metal ions and organic pollutants. Synthetic wastewater samples containi... Read More about A sunlight assisted dual purpose photoelectrochemical cell for low voltage removal of heavy metals and organic pollutants in wastewater.

Cryo-solvatochromism in ionic liquids (2014)
Journal Article
Yu, L., & Chen, G. Z. (2014). Cryo-solvatochromism in ionic liquids. RSC Advances, 4(76), 40281-40285. https://doi.org/10.1039/c4ra08116a

Cryo-solvatochromism (blue to green) in response to cooling from room temperature to well below 0 °C can have many applications, and has been achieved in an ionic liquid, 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate, containing di-(1-buty... Read More about Cryo-solvatochromism in ionic liquids.

Carbon electrodeposition in molten salts: Electrode reactions and applications (2014)
Journal Article
Ijije, H. V., Lawrence, R. C., & Chen, G. Z. (2014). Carbon electrodeposition in molten salts: Electrode reactions and applications. RSC Advances, 4(67), 35808-35817. https://doi.org/10.1039/c4ra04629c

The chemistry of carbon deposition in molten salts has been studied by a number of researchers with quite different interpretations of the reactions involved. This paper therefore reviews and discusses available literature on the cathodic and anodic... Read More about Carbon electrodeposition in molten salts: Electrode reactions and applications.

Achieving low voltage half electrolysis with a supercapacitor electrode (2013)
Journal Article
Peng, C., Hu, D., & Chen, G. Z. (2014). Achieving low voltage half electrolysis with a supercapacitor electrode. Energy and Environmental Science, 7(3), 1018-1022. doi:10.1039/c3ee43817a

Half electrolysis consists of a single faradaic reaction and a supercapacitor electrode. The electrolytic product is only produced at the faradaic electrode and the low voltage electrolysis is highly energy efficient.

The Ionic Diffusion Model for the Solid Oxide Cathode and Its Verification by the Electrolysis of Ta2O5 in Molten CaCl2 (2013)
Journal Article
Chen, H. L., Wang, Z. Y., Jin, X. B., & Chen, G. (2014). The Ionic Diffusion Model for the Solid Oxide Cathode and Its Verification by the Electrolysis of Ta2O5 in Molten CaCl2. Journal of Electrochemistry, 20(3), 266-271. https://doi.org/10.13208/j.electrochem.130886

The deoxidation speed of a solid oxide cathode in molten CaCl2 can be estimated by the PRS steady diffusion model of O2, which correlates the deoxidation speed with the precursor porosity, P, the metal-to-oxide molar volume ratio, R, and the cathode... Read More about The Ionic Diffusion Model for the Solid Oxide Cathode and Its Verification by the Electrolysis of Ta2O5 in Molten CaCl2.

Influences of ions and temperature on performance of carbon nano-particulates in supercapacitors with neutral aqueous electrolytes (2013)
Journal Article
Chae, J. H., & Chen, G. Z. (2014). Influences of ions and temperature on performance of carbon nano-particulates in supercapacitors with neutral aqueous electrolytes. Particuology, 15, 9-17. https://doi.org/10.1016/j.partic.2013.02.008

A commercial product of carbon nano-particles, Cabot MONACH 1300 pigment black (CMPB), was studied for basic structural information and electrochemical performance in neutral aqueous electrolytes, aiming at applications in supercapacitors. As confirm... Read More about Influences of ions and temperature on performance of carbon nano-particulates in supercapacitors with neutral aqueous electrolytes.

Near-net-shape production of hollow titanium alloy components via electrochemical reduction of metal oxide precursors in molten salts (2013)
Journal Article
Hu, D., Xiao, W., & Chen, G. Z. (2013). Near-net-shape production of hollow titanium alloy components via electrochemical reduction of metal oxide precursors in molten salts. Metallurgical and Materials Transactions B, 44(2), 272-282. https://doi.org/10.1007/s11663-013-9800-5

Metal oxide precursors (ca. 90 wt pct Ti, 6 wt pct Al, and 4 wt pct V) were prepared with a hollow structure in various shapes such as a sphere, miniature golf club head, and cup using a one-step solid slip-casting process. The precursors were then e... Read More about Near-net-shape production of hollow titanium alloy components via electrochemical reduction of metal oxide precursors in molten salts.

Forming metal powders by electrolysis (2013)
Book Chapter
Chen, G. Z. (2013). Forming metal powders by electrolysis. In I. Chang, & Y. Zhao (Eds.), Advances in Powder Metallurgy: Properties, Processing and Applications (19-41). Woodhead Publishing. https://doi.org/10.1533/9780857098900.1.19

Fossil fuels will eventually be replaced by renewables. Currently, the most feasible and efficient way of utilising renewable energy is to convert it to electricity. In response to this change, fossil energy-based pyrometallurgical processes will ine... Read More about Forming metal powders by electrolysis.

Electrochemical Performance of Screen-Printed Composite Coatings of Conducting Polymers and Carbon Nanotubes on Titanium Bipolar Plates in Aqueous Asymmetrical Supercapacitors (2012)
Journal Article
Zhou, X., & Chen, G. Z. (2012). Electrochemical Performance of Screen-Printed Composite Coatings of Conducting Polymers and Carbon Nanotubes on Titanium Bipolar Plates in Aqueous Asymmetrical Supercapacitors. Journal of Electrochemistry, 18(5-6), 548-565

Composites of conducting polymers (polypyrrole and polyaniline) with acid treated multi-walled carbon nanotubes were formulated into printable aqueous inks, with the aid of functional additives (benzethonium chloride as a surfactant with or without p... Read More about Electrochemical Performance of Screen-Printed Composite Coatings of Conducting Polymers and Carbon Nanotubes on Titanium Bipolar Plates in Aqueous Asymmetrical Supercapacitors.